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/* |
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* This file is part of Araknemu. |
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* |
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* Araknemu is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU Lesser General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* Araknemu is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public License |
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* along with Araknemu. If not, see <https://www.gnu.org/licenses/>. |
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* |
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* Copyright (c) 2017-2020 Vincent Quatrevieux |
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*/ |
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package fr.quatrevieux.araknemu.core.network.netty; |
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import fr.quatrevieux.araknemu.core.network.Server; |
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import fr.quatrevieux.araknemu.core.network.SessionIdle; |
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import fr.quatrevieux.araknemu.core.network.session.Session; |
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import fr.quatrevieux.araknemu.core.network.session.SessionFactory; |
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import io.netty.bootstrap.ServerBootstrap; |
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import io.netty.buffer.Unpooled; |
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import io.netty.channel.Channel; |
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import io.netty.channel.ChannelHandler; |
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import io.netty.channel.ChannelHandlerContext; |
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import io.netty.channel.ChannelInitializer; |
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import io.netty.channel.EventLoopGroup; |
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import io.netty.channel.nio.NioEventLoopGroup; |
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import io.netty.channel.socket.nio.NioServerSocketChannel; |
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import io.netty.handler.codec.DelimiterBasedFrameDecoder; |
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import io.netty.handler.codec.MessageToMessageEncoder; |
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import io.netty.handler.codec.string.StringDecoder; |
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import io.netty.handler.codec.string.StringEncoder; |
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import io.netty.handler.timeout.IdleStateEvent; |
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import io.netty.handler.timeout.IdleStateHandler; |
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import io.netty.util.CharsetUtil; |
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import org.checkerframework.checker.nullness.qual.MonotonicNonNull; |
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import java.time.Duration; |
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import java.util.Collection; |
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import java.util.Collections; |
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import java.util.List; |
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import java.util.concurrent.TimeUnit; |
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/** |
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* Server adapter for Netty |
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*/ |
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public final class NettyServer<S extends Session> implements Server<S> { |
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private final SessionFactory<S> factory; |
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private final int port; |
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private final Duration readTimeout; |
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private @MonotonicNonNull Channel serverChannel; |
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private @MonotonicNonNull EventLoopGroup loopGroup; |
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private @MonotonicNonNull SessionHandlerAdapter<S> handlerAdapter; |
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1 |
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public NettyServer(SessionFactory<S> factory, int port, Duration readTimeout) { |
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1 |
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this.factory = factory; |
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1 |
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this.port = port; |
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1 |
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this.readTimeout = readTimeout; |
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1 |
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} |
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@Override |
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public void start() { |
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final ServerBootstrap bootstrap = new ServerBootstrap(); |
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handlerAdapter = new SessionHandlerAdapter<>(factory); |
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final StringDecoder decoder = new StringDecoder(CharsetUtil.UTF_8); |
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final StringEncoder encoder = new StringEncoder(CharsetUtil.UTF_8); |
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final MessageToMessageEncoder<Object> messageEncoder = new MessageEndEncoder(); |
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bootstrap |
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.group(loopGroup = new NioEventLoopGroup(Runtime.getRuntime().availableProcessors())) |
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.channel(NioServerSocketChannel.class) |
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.childHandler(new ChannelInitializer<Channel>() { |
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protected void initChannel(Channel channel) { |
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channel |
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.pipeline() |
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.addLast(new DelimiterBasedFrameDecoder(4096, Unpooled.wrappedBuffer(new byte[]{10, 0}))) |
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.addLast(encoder) |
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.addLast(decoder) |
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.addLast(messageEncoder) |
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.addLast(new IdleStateHandler(readTimeout.toMillis(), 0, 0, TimeUnit.MILLISECONDS) { |
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@Override |
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protected void channelIdle(ChannelHandlerContext ctx, IdleStateEvent evt) throws Exception { |
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ctx.fireChannelRead(new SessionIdle(readTimeout)); |
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} |
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}) |
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.addLast(handlerAdapter) |
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; |
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} |
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}) |
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; |
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serverChannel = bootstrap |
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.localAddress(port) |
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.bind() |
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.channel() |
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; |
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} |
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@Override |
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public void stop() throws Exception { |
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if (loopGroup == null || serverChannel == null) { |
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return; |
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} |
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loopGroup.shutdownGracefully().sync(); |
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serverChannel.closeFuture().sync(); |
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} |
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@Override |
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public Collection<S> sessions() { |
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return handlerAdapter != null ? handlerAdapter.sessions() : Collections.emptyList(); |
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} |
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@ChannelHandler.Sharable |
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public static final class MessageEndEncoder extends MessageToMessageEncoder<Object> { |
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@Override |
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protected void encode(ChannelHandlerContext ctx, Object msg, List<Object> out) { |
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out.add(msg + "\000"); |
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} |
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} |
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} |
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Arakne /
Araknemu
